Lock nut



J. W. BRODERICK.

LOCK NUT.

APPLICATION FILED APR. 3. 1920.

lfifi flma Pafwntedi mm 17 1922,

IIVVEAITOR Mf @M. M w

I A TTORNEW I states can 17, was.

treatise JOHN W. BRODEEICK, 0F

HILLSIDE, NEW JERSEY, ASSIGNOE. 0E ONE-HALF TO IRUS- SELL M. EVERETT, 0FBLOOMFIELD, NEW JERSEY.

LOCK NUT.

Application flled April 3, 1920. Serial No. 370,984.

To all whom it may concern Be it known that a citizen of Hillside, inthe county 5 State of New Jersey,

ll, JOHN W. BnonninoK, States, and a resident of Union and have inventednew and of the United useful Improvements in Look Nuts, of which thefollowing IS a specification.

This invention relates in general to lock nuts and more particularly toa devlce of this character which operates in the manner of an ordinaryjam nut.

The objects of the invention are to provide a lock nut embodying novelfeatures of construction and particularly segmental marginal portions orflanges upon one of the meeting ends of the sections of such a lock nut,which flanges can be readily sprung or bent over a reduced portion ornose with undercut side meeting tions; to

tions by entering walls on the other of said ends to swivelly connectthe seclimit relative turning of the secmeans of stop projections uponends of said sections recesses in the other of said meeting ends, whichrecesses open through the outer walls of the become clogged with sectionand thus cannot dirt or the like; to

further have said recesses open through both the inner and outer wallsof the sections;

to locate such recemes between the segmental flanges for swivellyconnecting the sections and thus render it possible for th m to open asalready stated; to thus obtain improved means for connecting the twosections of the nut inexpensive and to secure a simple and to obtainother objects and results as may be brought out by the followingdescription.

Referring to the accompanying drawing,

in which the same Figure 1 is a like numerals of reference indicateparts throughout the several views, side elevation of a lock nutembodying my invention applied to a bolt,

the lock nut being shown Figure lock nut in released 2 is a similar viewshowing the in a locked position;

Figure I 3 is a horizontal sectional view taken on Figure 4 is a similarview line 4-4, of Fig.

Figure 5 1s a the line 3-3 of Fig.

taken on the de tached perspective view of the lower or main section ofthe nut,

'character A designates a bolt threaded at one end thereof as at B, andhavin a head C at the opposite end thereof. he look nut D comprises twopolygonal sections 1 and 2, both of said sections 1 and 2 of the nutbeing threaded correspondingly to the bolt A and adapted to screwthereon in a conventional manner. @ne of the sections, in the presentinstance the section 1 is pro- 'vided at one end thereof with anupstanding inverted frusto-conical boss 3 set slightly inwardly of theside edges of the nut, said boss being formed with a pair' of radiallydisposed stop pro ections or ribs 4:, saidribs bein arran ed inlongitudinal alinement an extendlng diametrically of the boss 3.

The section 2 of the nut is cut away at one end thereof as at 5 to forma pair of opposed side flanges 6 having inwardly diverging undercutarcuate grooves 7 to fit over and receive the edges of the frustoconicalboss 3 of the section 1 of the nut.

The boss 3 may be fitted in the grooves 7 in any suitable manner, as byfirst bending the flanges 6 outwardly, the grooves and then bending theflanges inwardly, or first slipping the boss between the flanges andthen upsetting or spreading the same into the grooves 7. The section 2is further provided at the bases of the grooves 7 with upstanding lugs8, said lugs being formed with radially disposed side stop shoulders 9adapted to cooperate with the respective stop projections or ribs 4; onthe section 1 to limit relative movement of the two sections 1 and 2-. Aswivel connection is thus provided between the two sections of the nutand the sections 1 and 2 are preferably snugly and frictionallyconnected by the boss 3 and flanges 6 so as to be rotatable upon eachother only by the use of a wrench for turning them. The ribs 4 and thestop shoulders 9 are arranged so slipping the boss in acs-- s tions ofthe nut into alinement as shown by Figures 1 and 3.

In the use of the lock nut D, the two sec- I tions are screwed onto thebolt A with the respective side faces in alinement as shown by Figures 1and 3 until the inner section of the nut is firmly clamped against thework being bolted. The outer section of the nut is then slightly rotatedfurther in the same direction whereby the saidsection acts as a jam nutto lock the nut upon the bolt, as shown by Figures 2 and 4, this act-ionbeing insuflicient to cause the ribs 4 to engage the shoulders 9. Toremove the nut or loosen the same, the outer section is firstindependently turned backwardly until the ribs 4: and stop shoulders 9engage, this bringing the respective side faces of both the nut sectionsinto alinement (see Figures 1 and 3), after which the wrench is appliedto both sections, which can then be easily loosened from the bolt. Thestop shoulders 9 and ribs 4 prevent the outer section of the nut frombeing rotated too far backwardly to lock the nut again as it is beingloosened and facilitate in causing the two sections to rotate togetherwhen the nut is being loosened. Obviously after the nut has beenloosened it is not necessary to maintain the wrench on both sections asrotation of the outer section will, due to the ribs 4 and shoulders 9,cause a corresponding rotation of the other section, which would not bepossible were the two sections not provided with this stop means.

It will be noted that the side flanges 6, 6 are segmental orextend eachfor only a segment of the circumference of the section, which enablesthe recesses between the shoulders 9, 9 of the lugs 8, 8 to open throughthe outer and inner walls of the section. This construction not onlyconduces to ease and cheapness of manufacture, but also prevents therecesses from clogging with dirt'or the like, enables the working of thenut to be seen, and so forth.

' Various modifications may be made in the details of construction of myimproved lock nut without departing from the spirit or scope of'theinvention, and I do not wish to be understood as limiting myself excepting ends of said sections having stop pro-' jections and the other ofsaid meeting ends having recesses for said stop projections, saidrecesses opening through the outer Walls of the section, and means forswivelly connecting said sections. a

3. A look nut including superposed continuously threaded sections, oneof the meeting ends of said sections having stop projections and theother of said meeting ends having recesses for said stop projections,said recesses opening through the inner and outer walls of the section,and means for swivelly connecting said sections.

4. A look nut including superposed continuously threaded sections, oneof the meeting ends of said sections having a reduced portion withundercut sides and stop projections on its end face and the other ofsaid meeting ends of the sections having undercut segmental flangesreceivingsaid reduced portion and recesses between said segmentalflanges opening through the outer walls of the section and receiving thestop projections, whereby the sectio"s"-are swivelly connectedand-,relatiue turning of them limited.

5. A look nut including superposed continuously threaded sections, oneof the meeting ends of saidcs'ections having a reduced portion with{undercut sides and stop projections on itsend face and the 'other ofsaid meeting ends of the sections having undercut segmental flangesreceiving said reduced portion and recesses between said segmentalfiangesopening through both the ceiving the stop projections, wherebythe sections are swivelly connected and relative turning of themlimited.

JOHN W. BRODERICK.

inner and outer walls of the section and re-

